In a charge-transfer complex, the energy of a transition is proportional to the difference between the optical value of this 
In a charge-transfer complex, the energy of a transition is proportional to the difference between the optical value of this quantity for the metal and the ligand. Electrons distribute themselves to equalize this quantity according to Sandersen, while a y-intercept of .744 appears in the equation for the Allred-Rochow scale of it. Common methods of measuring this quantity include the mean of the first ionization energy and the electron affinity. For 10 points, name this quantity which is high for fluorine and has scales named for Mulliken and Pauling, the tendency of an atom to pull electrons toward it in a covalent bond.
In a charge-transfer complex, the energy of a transition is proportional to the difference between the optical value of this quantity for the metal and the ligand.
electronegativity